D. Colley is a CAD Designer and an AIDT certified Pipe Fitter, with extensive experience in architectural, civil, electrical and piping designs. He works with multiple materials including plastic, wood, metal, glass, cement, ceramic, fiber, leather and paper, and prepares drawings and topographical and relief maps used in civil engineering projects, such as highways, bridges, pipelines, flood control projects, and water and sewerage control systems. He also provides the following services: